export default function validate(code){  
    //身份证号合法性验证  
    //支持15位和18位身份证号  
    //支持地址编码、出生日期、校验位验证  
    var city={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外 "};  
    var msg = true;
   	
    if(!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[012])(0[1-9]|[12]\d|3[01])\d{3}(\d|[xX])$/.test(code)){  
       msg = "身份证号格式错误"; 
    }else if(!city[code.substr(0,2)]){  
       msg = "身份证号地址编码错误";
    }else{  
        //18位身份证需要验证最后一位校验位  
        if(code.length == 18){  
            code = code.split('');  
            //∑(ai×Wi)(mod 11)  
            //加权因子  
            var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ];  
            //校验位  
            var parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ];  
            var sum = 0;  
            var ai = 0;  
            var wi = 0;  
            for (var i = 0; i < 17; i++)  
            {  
                ai = code[i];  
                wi = factor[i];  
                sum += ai * wi;  
            }  
            if(parity[sum % 11] != code[17].toUpperCase()){  
       			msg = "身份证号校验位错误";
            }  
        }  
    }  
    return msg;  
}